APACR · StoneBridge Acquisition II Corp · Holdings
Substantial doubt about the company's ability to continue as a going concern.
“management has determined that this mandatory liquidation date, together with the Company's lack of operating revenues and dependence on the Trust Account, raises substantial doubt about the Company's ability to continue as a going concern within one year after the date these financial statements are issued. Management's plans in this regard, including efforts to consummate an initial Business Combination within the Completion Window, cannot be deemed probable of alleviating this substantial doubt as of the date of these financial statements.”View the 10-Q filed Aug 14, 2026
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Holder Concentration
Across 1 13F filers · Δ vs Jun 30, 2026Who Holds APACR
Last 4 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 19 filers, like-for-like change +5.5%; actively managed books +5.5%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 75.7% | 13 | -3.0% |
| Adviser | 8.2% | 1 | +1277.9% |
| Non-US | 1.8% | 1 | 0.0% |
| Insurer | 0.0% | 0 | — |
| Unknown | 14.3% | 4 | -0.4% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Systematic-like | 7.1% | 2 | +10.4% |
| Concentrated | 16.3% | 3 | -0.1% |
| Diversified active | 76.6% | 14 | +6.4% |
| Index-like | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Medium turnover | 27.0% | 6 | -6.7% |
| High turnover | 68.3% | 12 | +11.9% |
| Unknown | 4.7% | 1 | -1.6% |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 72.4% | 13 | +9.0% |
| Medium horizon | 4.5% | 1 | 0.0% |
| Long horizon | 6.2% | 2 | 0.0% |
| Unknown | 16.8% | 3 | -4.0% |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 19.5% | 5 | -4.6% |
| $1B to $10B | 69.5% | 11 | +9.9% |
| $10B to $100B | 9.2% | 2 | -0.8% |
| $100B or more | 1.8% | 1 | 0.0% |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Pooled investment vehicles | 64.6% | 12 | -3.5% |
| Registered funds and BDCs | 11.1% | 1 | 0.0% |
| Unknown | 24.3% | 6 | +45.3% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 75.7% | 13 | -3.0% |
| Unknown | 24.3% | 6 | +45.3% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 87.2% | 16 | +5.5% |
| Outside the US | 12.8% | 3 | +6.1% |
The Sep 30, 2026 filing window is still open, so its bar shows only the filers that have filed so far.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Conviction and Crowding
19 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).
Shared Holders
Companies APACR's active holders also own, quarter ended Jun 30, 2026| # | Company | Shared holders |
|---|---|---|
| 1 | EURK Eureka Acquisition Corp | 5 |
| 2 | BKHA Black Hawk Acquisition Corp | 4 |
| 3 | BXBL BOXABL Inc. | 4 |
| 4 | ORIQ Origin Investment Corp I | 5 |
| 5 | QUMS Quantumsphere Acquisition Corp | 6 |
| 6 | RFAM RF Acquisition Corp III | 6 |
| 7 | CHPG ChampionsGate Acquisition Corp | 6 |
| 8 | WENC West Enclave Merger Corp. | 4 |
| 9 | PONO Pono Capital Four, Inc. | 6 |
| 10 | ARCL ARC Group Acquisition I Corp. | 6 |
Shareholder Targets
13F filers that own its peers but not APACR, quarter ended Jun 30, 2026Found through its holder-overlap peers: EURK, BKHA, BXBL, ORIQ, QUMS, RFAM, CHPG, WENC, PONO, ARCL, XFLH, SCII, FVN, DTSQ, XSLL, BPAC, QSEA, LCCC, GIX, KFII. 78 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | Linden Advisors LP Registered adviser, Diversified active | $53,427,606 11 held | SCII, KFII, PONO |
| 2 | D. E. Shaw & Co., Inc. Unknown, Systematic-like | $52,538,040 15 held | KFII, GIX, XSLL |
| 3 | TENOR CAPITAL MANAGEMENT Co., L.P. Registered adviser, Diversified active | $48,586,047 5 held | GIX, KFII, SCII |
| 4 | Magnetar Financial LLC Registered adviser, Concentrated | $45,710,891 8 held | KFII, XSLL, PONO |
| 5 | Hudson Bay Capital Management LP Registered adviser, Diversified active | $43,074,471 13 held | KFII, ORIQ, ARCL |
| 6 | WHITEBOX ADVISORS LLC Registered adviser, Diversified active | $30,078,730 11 held | PONO, ARCL, RFAM |
| 7 | MILLENNIUM MANAGEMENT LLC Registered adviser, Systematic-like | $28,057,116 4 held | GIX, XSLL, KFII |
| 8 | First Trust Capital Management L.P. Registered adviser, Diversified active | $20,255,799 7 held | SCII, CHPG, WENC |
| 9 | Calamos Advisors LLC Registered adviser, Diversified active | $18,665,741 5 held | XSLL, PONO, ARCL |
| 10 | Periscope Capital Inc. Exempt adviser, Diversified active | $18,139,600 9 held | KFII, XSLL, SCII |
Quarterly Activity
New and Sold Out count only filers that reported a 13F for both quarters: a first-time filer's book is not a buy, and a fund that has not filed, or withheld its positions under confidential treatment, has not sold.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mid ABC ARBITRAGE SA APACR | $2,200 | 100.00% | 20,000 | Shares | 2026-10-23 |